# 1. Product introduction

**KS0095 KEYESTUDIO CNC Kit V3.0**

![](media/wps1.jpg)

## 1.1 Introduction

Keyestudio CNC Shield V3.0 can be used as driver expansion board for engraving machines . It has in total 4 channel slots for A4988 stepper motor driver modules (not included) for driving 4 channel of stepper motors. 

Each channel of stepper motor only needs 2 IO ports, which means 6 IO ports is sufficient to manage 3 stepper motors. This shield can make quick work for managing stepper motors in your project.

## 1.2 Specification

- Latest Keyestudio CNC Shield Version 3.0
- GRBL 0.8c compatible. (Open source firmware that runs on a keyestudio V4.0 board that turns G-code commands into stepper signals)
- 4-Axis support (X, Y, Z , A-Can duplicate X,Y,Z or do a full 4th axis with custom firmware using pins D12 and D13)
- 2 x End stops for each axis (6 in total)
- Spindle enable and direction
- Coolant enable
- Uses removable Pololu A4988 compatible stepper drivers. (A4988, DRV8825 and others)
- Jumpers to set the Micro-Stepping for the stepper drivers. (Some drivers like the DRV8825 can do up to 1/32 micro-stepping )
- Compact design.
- Stepper Motors can be connected with 4 pin molex connectors or soldered in place.
- Runs on 12V DC.

## 1.3 Kit List

- 1x Keyestudio CNC Shield V3.0
- 1x keyestudio V4.0 Board
- 4x A4988 Driver
- 1x USB Cable

## 1.4 Connection Diagram

![](media/wps2.png)

## 1.5 Keyestudio V4.0 Development Board

We need to know keyestudio V4.0 development board, as a core of this smart car.

![](media/wps3.jpg)

keyestudio V4.0 development board is an Arduino V4.0-compatible board, which is based on ATmega328P MCU, and with a cp2102 Chip as a UART-to-USB converter. 

![](media/wps4.png)

It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz quartz crystal, a USB connection, a power jack, 2 ICSP headers and a reset button.

![](media/wps5.png)

It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it via an external DC power jack (DC 7-12V) or via female headers Vin/ GND(DC 7-12V) to get started.

![](media/1.png)